Using nothing more but common sense, inside knowledge of the Switch and what Team Xecuter has posted, here're some facts:
1 - It's going to be a hardmod glitch setup;
2 - It simply replicates the bootROM glitch attack that grants bootloader code execution;
3 - This level of code execution allows you to extract the PK11 key, which they have shared as "proof" (this key changes on bootloader revisions);
4 - It also grants you access to the SBK KEYSLOT (not the actual key);
5 - All this was detailed during 34c3;
6 - The price tag will be high, simply due to how something like this must be fabricated in order to make it "just work" on any Switch;
7 - You can recreate this setup for less than 20 bucks, but it won't be as "pretty";

Click to expand...

Fun fact: the claim that this is "future proof" is false. There are at least 2 ways their device can be rendered useless *without* an hardware revision, but I guess people will figure that out the "hard way".

Don't think many people would be okay with this. A lot of people with interest in hacking have no idea how to solder, nor would they likely want to risk the console they paid 300 clams for by attempting to solder. Why anyone would prefer soldering (especially on something as delicate as the switch) is fucking beyond me...